Epson EcoTank ET-3800 Series User Manual page 99

Maintaining the Printer
3. Open the scanner unit with both hands until it locks.
4. Check if the translucent film is smeared. Smears are easier to see if you use a light.
If there are smears (such as finger marks or grease) on the translucent film (A), go to the next step.
A: Translucent film
B: Rail
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Improving Print, Copy, and Scan Quality
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Cleaning the Translucent Film